CN2511820Y

CN2511820Y - Expanding cushion ring

Info

Publication number: CN2511820Y
Application number: CN 01279543
Authority: CN
Inventors: 张国伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-26
Filing date: 2001-12-26
Publication date: 2002-09-18
Anticipated expiration: 2011-12-26

Abstract

An expanding cushion ring comprises an expanding pipe, one end of the expanding pipe is provided with a radial outward flange, while the other end of the expanding pipe is provided with a radial opening; the exterior of the end provided with a radial opening is provided with ribs along the circumference. The utility model realizes the aim of connection by expanding cushion when a bolt is made to insulate the connected objects. Convenient installation and connection without a screw or a nut can be achieved without producing lemel and burr, thereby ensuring product safety and increasing work efficiency.

Description

Washer with expanding plug

Technical field

The utility model relates to a kind of link, and particularly a kind of washer with expanding plug is mainly used in being connected between the electronic device and radiating fin in the electronic product.

Background technique

In the production of electronic apparatus, some more powerful electronic device (as rectifying and voltage-stabilizing piece, power amplifier) needs to be connected with radiating fin (or base plate).Its connecting means is generally adopted screw the heat sink electrodes of electronic device to be connected in the screw of radiating fin or with nut the two is fixed together.Sometimes dissipation from electronic devices electrode and radiating fin are not same current potentials, need insulation.Have some burrs and metal fillings in the joint when connecting, may cause the short circuit between electronic device and the radiating fin, also may be scattering into the fault that causes other circuit on the circuit board with screw; Also has the low shortcoming of installation efficiency and adopt nut to connect.

The model utility content

The purpose of this utility model just provides a kind of metal fillings, washer with expanding plug that installation efficiency is high of not producing.

The technical solution of the utility model is: comprise expand tube, at the one end footpath outward flange is arranged, at its other end axial gap is arranged, at the outer surface of this end fin along circumference is arranged.

Described expand tube has the internal diameter of an end of gap less than the internal diameter at other positions, rounding off between the big or small internal diameter.

This packing ring is made by nylon material.

It is conical bore that described expand tube has flange one end, and its conical surface is curved.

Obviously, the utility model make insulate between screw and the connected body in, the plug that utilize to expand is realized purpose of connecting.Need not screw thread or nut just can connection be installed easily, do not have metal fillings and burr to produce, guaranteed the safety of product and improved work efficiency.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is a perspective view of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 3;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the utility model exploded view in use;

Fig. 5 is the utility model cut-open view of final assembly in use.

Embodiment

Referring to Fig. 1-Fig. 3, the utility model has footpath outward flange 2 at an end of expand tube 1, and the other end has axial gap 3, and the fin 31 along circumference is arranged in its outside.Gap 3 helps expand tube 1 and outwards splashes bloated.Fin 31 can increase join strength.Less at the internal diameter that gap 3 is arranged, it is bloated also to help splashing.At the end that flange 2 is arranged is conical bore, and its conical surface is curved, helps the importing of screw 7 (seeing Fig. 4,5), convenient working.

Referring to Fig. 4 and Fig. 5, the utility model in use, insert in the fixed hole of electronic device 4 and radiating fin 5, at the two insulating trip 6 (generally being sheet mica) is arranged, be screwed in the expand tube 1 of the present utility model from the end that flange is arranged with tapping screw 7, there is packing ring 8 at the nut place, and tapping screw 7 end that is plugged with gap 3 that will expand struts, the outside and the radiating fin 5 of fin 31 closely are fixed together, reach purpose of connecting.

Compare with other connecting mode, swelling connects can not produce metal fillings and burr, has reliable fastening effect simultaneously, is fit to produce in enormous quantities.

The utility model adopts nylon material to make, and can satisfy the requirement to insulation, thermal deformation, mechanical strength.

Adopt the advantage of this product to be:

1 has fundamentally stopped the generation of metallic bur power and metal fillings, has thoroughly solved because of metal kernel The electric property that thorn and metal fillings cause lost efficacy.

2 have cancelled fin tapping technology, only do punching and get final product, and have effectively reduced cost, carry High processing and installation efficiency.

Claims

1, a kind of washer with expanding plug is characterized in that: comprise expand tube, at the one end footpath outward flange is arranged, at its other end axial gap is arranged, at the outer surface of this end fin along circumference is arranged.

2, washer with expanding plug according to claim 1 is characterized in that: described expand tube has the internal diameter of an end of gap less than the internal diameter at other positions, rounding off between the big or small internal diameter.

3, washer with expanding plug according to claim 1 and 2 is characterized in that: this packing ring is made by nylon material.

4, washer with expanding plug according to claim 1 and 2 is characterized in that: it is conical bore that described expand tube has flange one end, and its conical surface is curved.